Example #1
0
func (runtime *Runtime) Diff(container *Container) (archive.Archive, error) {
	if differ, ok := runtime.driver.(graphdriver.Differ); ok {
		return differ.Diff(container.ID)
	}

	changes, err := runtime.Changes(container)
	if err != nil {
		return nil, err
	}

	cDir, err := runtime.driver.Get(container.ID)
	if err != nil {
		return nil, fmt.Errorf("Error getting container rootfs %s from driver %s: %s", container.ID, container.runtime.driver, err)
	}

	archive, err := archive.ExportChanges(cDir, changes)
	if err != nil {
		return nil, err
	}
	return utils.NewReadCloserWrapper(archive, func() error {
		err := archive.Close()
		runtime.driver.Put(container.ID)
		return err
	}), nil
}
Example #2
0
// TarLayer returns a tar archive of the image's filesystem layer.
func (img *Image) TarLayer() (archive.Archive, error) {
	if img.graph == nil {
		return nil, fmt.Errorf("Can't load storage driver for unregistered image %s", img.ID)
	}
	driver := img.graph.driver
	if differ, ok := driver.(graphdriver.Differ); ok {
		return differ.Diff(img.ID)
	}

	imgFs, err := driver.Get(img.ID)
	if err != nil {
		return nil, err
	}
	if img.Parent == "" {
		return archive.Tar(imgFs, archive.Uncompressed)
	} else {
		parentFs, err := driver.Get(img.Parent)
		if err != nil {
			return nil, err
		}
		changes, err := archive.ChangesDirs(imgFs, parentFs)
		if err != nil {
			return nil, err
		}
		return archive.ExportChanges(imgFs, changes)
	}
}
Example #3
0
File: image.go Project: 98pm/docker
// TarLayer returns a tar archive of the image's filesystem layer.
func (img *Image) TarLayer() (arch archive.Archive, err error) {
	if img.graph == nil {
		return nil, fmt.Errorf("Can't load storage driver for unregistered image %s", img.ID)
	}
	driver := img.graph.Driver()
	if differ, ok := driver.(graphdriver.Differ); ok {
		return differ.Diff(img.ID)
	}

	imgFs, err := driver.Get(img.ID, "")
	if err != nil {
		return nil, err
	}

	defer func() {
		if err != nil {
			driver.Put(img.ID)
		}
	}()

	if img.Parent == "" {
		archive, err := archive.Tar(imgFs, archive.Uncompressed)
		if err != nil {
			return nil, err
		}
		return utils.NewReadCloserWrapper(archive, func() error {
			err := archive.Close()
			driver.Put(img.ID)
			return err
		}), nil
	}

	parentFs, err := driver.Get(img.Parent, "")
	if err != nil {
		return nil, err
	}
	defer driver.Put(img.Parent)
	changes, err := archive.ChangesDirs(imgFs, parentFs)
	if err != nil {
		return nil, err
	}
	archive, err := archive.ExportChanges(imgFs, changes)
	if err != nil {
		return nil, err
	}
	return utils.NewReadCloserWrapper(archive, func() error {
		err := archive.Close()
		driver.Put(img.ID)
		return err
	}), nil
}
Example #4
0
func (runtime *Runtime) Diff(container *Container) (archive.Archive, error) {
	if differ, ok := runtime.driver.(graphdriver.Differ); ok {
		return differ.Diff(container.ID)
	}

	changes, err := runtime.Changes(container)
	if err != nil {
		return nil, err
	}

	cDir, err := runtime.driver.Get(container.ID)
	if err != nil {
		return nil, fmt.Errorf("Error getting container rootfs %s from driver %s: %s", container.ID, container.runtime.driver, err)
	}

	return archive.ExportChanges(cDir, changes)
}